diff --git a/apps/foo/src/main/java/org/onlab/onos/foo/TestIOClientCommand.java b/apps/foo/src/main/java/org/onlab/onos/foo/TestIOClientCommand.java
index 52128e3..612d320 100644
--- a/apps/foo/src/main/java/org/onlab/onos/foo/TestIOClientCommand.java
+++ b/apps/foo/src/main/java/org/onlab/onos/foo/TestIOClientCommand.java
@@ -1,5 +1,6 @@
 package org.onlab.onos.foo;
 
+import org.apache.karaf.shell.commands.Argument;
 import org.apache.karaf.shell.commands.Command;
 import org.onlab.onos.cli.AbstractShellCommand;
 
@@ -12,12 +13,32 @@
          description = "Starts the test IO loop client")
 public class TestIOClientCommand extends AbstractShellCommand {
 
+    @Argument(index = 0, name = "serverIp", description = "Server IP address",
+              required = false, multiValued = false)
+    String serverIp = "127.0.0.1";
+
+    @Argument(index = 1, name = "workers", description = "IO workers",
+              required = false, multiValued = false)
+    String workers = "6";
+
+    @Argument(index = 2, name = "messageCount", description = "Message count",
+              required = false, multiValued = false)
+    String messageCount = "10000000";
+
+    @Argument(index = 3, name = "messageLength", description = "Message length (bytes)",
+              required = false, multiValued = false)
+    String messageLength = "128";
+
+    @Argument(index = 4, name = "timeoutSecs", description = "Test timeout (seconds)",
+              required = false, multiValued = false)
+    String timeoutSecs = "30";
+
     @Override
     protected void execute() {
         try {
-            startStandalone(new String[]{});
+            startStandalone(new String[]{serverIp, workers, messageCount, messageLength, timeoutSecs});
         } catch (Exception e) {
-            error("Unable to start server %s", e);
+            error("Unable to start client %s", e);
         }
     }